
%0 Journal Article
%A Waters, AF 
%A White, AH 
%T Synthesis and Structural Systematics of Nitrogen Base Adducts of Group 2 Salts. V. Some Complexes With 3-Azapentane-1,5-diamine
%J Australian Journal of Chemistry
%D 1996/01/01
%V 49
%N 1
%P 73-86
%K 
%R https://doi.org/10.1071/CH9960073
%U https://www.publish.csiro.au/paper/CH9960073 
%X Syntheses and room-temperature single-crystal X-ray structural characterizations are recorded for an array of adducts of H2N(CN2)2NH(CH2)2NH2, ' dien ', with salts of Group 2 elements, MX2.n( dien ).[Mg( dien )2] Cl2 (1) is monoclinic, P 21/c, a 11.326(6), b 10.928(5), c 12.636(6) &#506;, &#946; 92.74(4)&#176;, Z = 4 f.u .; R was 0.047 for No 1726 independent 'observed' (I > 3&#963;(I)) diffractometer reflections. [Mg( dien )2] Br2 (2) is monoclinic, P 21/c, a 9.541(7), b 14.55(1), c 11.894(8) &#506;, &#946; 100.42(5)&#176;, Z = 4 f.u ., R 0.054 for No 1778. [Mg( dien )2] I2 (3) is isomorphous , a 9.969(2), b 14.907(2), c 12.300(3) &#506;, &#946; 100.02(2)&#176;, R 0.039 for No 3180. In all three complexes, the two tridentate ligands are disposed mer in a six-coordinate MgN6 environment, the trans Mg-N(central) distances being somewhat shorter (2.161 (4)-2.181(9)&#506;) than Mg-N(distal) (2.215(8)-2.249(4)&#506;). [Ba(dien)3] Cl2 (4a) is orthorhombic, Pnaa , a 19.309(2), b 13.545(2), c 8.872(2)&#506;, Z = 4 f.u ., R 0.055 for No 1070; the methanol disolvate (4b) is monoclinic, P 21/c, a 16.807(8), b 8.764(5), c 19.493(4) &#506;, &#946; 102.39(3)&#176;, Z = 4 f.u ., R 0.11 for No 2613. A family of derivative structures (5)-(8), [M( dien )3] X2, M, X = Sr , Br (5), Sr , I(6), Ba , Br (7), Ba , I(8), have cells of half the volume (a &#8776; 13.8, b &#8776; 9, c &#8776; 9.8 &#506;), probable space group P21212, R 0.050, 0.061, 0.034, 0.037 for No 549, 914, 1044, 1801 respectively, with the cations disposed about crystallographic 2 axes with one disordered ligand . [ Ba( dien )3](ClO4)2 (9) is rhombohedral , R3c, a 10.240(2), c 45.19(1) &#506; (hexagonal setting), Z = 6 f.u ., R 0.054 for No 508. Like (4)-(8), the barium environment is nine-coordinate with the three tridentate ligands here  disposed about a 3 axis through the metal. 
